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Y301-880 Technical Manual ​

Applicable Model: Y301-880

This manual provides integration guidance for the Y301-880 high-density relay I/O module featuring eight opto-isolated digital inputs (DI) and eight SPDT relay outputs (DO). Use this document to commission the hardware, understand the Modbus register map, and configure automation logic.

Table of Contents ​

  1. Introduction
  2. System Overview
  3. Hardware Interfaces
  4. Electrical Specifications
  5. Modbus Communication Parameters
  6. Configuration Workflow
  7. Automation & Linkage Rules
  8. Wiring Guidelines
  9. Diagnostics & Maintenance

1. Introduction ​

  • Operates as a Modbus-RTU slave over RS485 (default) or RS232.
  • Accepts 5–36 VDC input with reverse-polarity protection and watchdog supervision.
  • Rated for -40 °C to +85 °C operation with 35 mm DIN rail or screw mounting.
  • Provides eight DI, eight DO with independent indicators, DIP switch addressing, and reload/reset button.

2. System Overview ​

  • DI channels support dry/wet wiring, 5–255 ms debounce, and 32-bit pulse counting.
  • DO channels are SPDT relays (COM/NO/NC) rated AC 277 V / 10 A or DC 28 V / 10 A; DO retention preserves states through soft or power resets.
  • LED cluster covers POWER, WORK (heartbeat), DI1…DI8, DO1…DO8, TX/RX.
  • Reload button (3–15 s press) restores factory defaults while keeping DIP offset.

3. Hardware Interfaces ​

  • Power: V+/V− screw terminals plus 5.5 × 2.1 mm DC jack.
  • DI block: COM+, COM−, DI1…DI8.
  • DO block: For each relay channel n, contacts are NCn / COMn / NOn.
  • Communication: RS485 A/B/GND by default; RS232 exposes TX/RX/GND on the same terminal block.
  • DIP Switch: SW1–SW5 provide binary address offset (ON = 1).

4. Electrical Specifications ​

  • Supply: 5–36 VDC. Typical draw ≈260 mA @12 V; 350 mA max with all relays energized.
  • DI: 8 channels, <5 mA per channel, 5–36 V wet threshold, 100 Hz sampling.
  • DO: 8 SPDT relays, AC 277 V / 10 A or DC 28 V / 10 A, <10 ms pickup, <5 ms release, ≥100 k electrical cycles.
  • Environmental: -40 °C to +85 °C, 5–95% RH non-condensing, IP20 UL94 V-0 enclosure.

5. Modbus Communication Parameters ​

  • Addressing: Base address set via holding register 40063 (range 1–255). DIP offset (0–31) is added on top for quick staging.
  • Baud Rate: 600–230400 bps (default 9600) using register 40088.
  • Frame Format: Standard Modbus-RTU with CRC16.
  • Function Codes: 0x01, 0x02, 0x03, 0x05, 0x06, 0x0F, 0x10 supported.
  • Coil Map: DO1…DO8 mapped to coil 0x0000…0x0007. DI1…DI8 mapped to discrete inputs 0x0000…0x0007.
  • Automation Block: Starting at PLC 40129 (0x0080). Each rule consumes 16 bytes (Mode, Action, DO index, Trigger index, Param1, Param2).
  • Pulse Counters: PLC 41281…41295 provide 32-bit counts for DI1…DI8 (write zero to clear).
  • Special Register: 0x0800 write 0x5500 for soft reboot; 0x0055 for factory reset.

6. Configuration Workflow ​

  1. Connect via HYToolBox, Modbus Poll, or another RTU master.
  2. Discover devices with broadcast address 0 if necessary; assign a unique base address (register 40063).
  3. Adjust baud rate, parity, stop bits via registers 40088–40092 to match network settings.
  4. Set debounce (40067) and pulse edge mode (40066) per DI channel needs.
  5. Choose DO retention mode (40065) to preserve relay states through resets.
  6. Populate automation rules from register 0x0080 upward (two rules per DO → sixteen total).
  7. Configure heartbeat, broadcast behavior, and device naming (registers 40047+, 40064, 40077) for SCADA identification.

7. Automation & Linkage Rules ​

  • Mode 0 DI Follow, Mode 1 Reverse follow
  • Mode 2 Pulse output
  • Mode 3/4 Delay on/off
  • Mode 5 Cycle
  • Mode 6/7 Absolute and interval timers
  • Mode 8 Schedule (requires RTC register 40086)
  • Mode 9 Daily timer
  • Mode 10 Watchdog (DI heartbeat)
  • Mode 11 Button mode
  • Mode 12–15 Logic (AND/OR/XOR) and extended functions per firmware release

Rule capacity = 8 DO × 2 rules = 16 stored automation blocks. Rules execute in ascending register order.

8. Wiring Guidelines ​

  • Power: Use 20–16 AWG wires with upstream 2 A fuse; keep leads short.
  • DI Dry: COM+ through external switch back to DIx. DI Wet: External 5–36 V drives DIx with COM− return.
  • DO: Install RC snubbers on AC inductive loads or flyback diodes on DC coils.
  • RS485: Shielded twisted pair, 120 Ω termination at both ends, common reference ground.

9. Diagnostics & Maintenance ​

  • Status LEDs indicate supply state, firmware heartbeat, I/O activity, and serial traffic.
  • Reload button restores defaults (base address resets to 1, DIP offset retained).
  • Maintenance checklist: retighten terminal screws every six months, inspect insulation, monitor Modbus retries.
  • Manufacturer: Hunan Yanji Tech Co.,Ltd
  • Address: Room 21014, Unit 1, Fudixingguang Plaza, Yuhua District Yingxin Road, Changsha, Hunan, P.R. China
  • Email: hi@yanjiiot.com
  • Website: www.yanjiiot.com